Abstract
Abstract This study was carried out on the flowers of 'Le Castel' Dahlia (starflower) cultivated in Tokat Gaziosmanpaşa University Agricultural Research and Application Center in 2019. The study aimed to prolong the vase life of Dahlia flowers used as cut flowers. Deionized water (control), sucrose + deionized water, thyme oil, lavender oil, carvacrol, thymol, sodium hypochlorite, and gibberellic acid were used as vase solutions. The total vase solution uptake (g/stem), daily vase solution uptake (g/day fresh weight (FW)), proportional FW (%) and vase life (day) parameters were determined based on Dahlia flowers that harvested at different harvest stages (3, 4 and 5 layers). As a result; the most extended vase life was measured in the gibberellic acid treatment (8.22 days), the highest proportional fresh weight was measured in the carvacrol in the 6th day (139.78%), the highest daily solution uptake was measured in the thyme oil in 0-2 days (11.7 g/day FW) and the highest total solution uptake was measured in the thyme oil (27.5 g/stem). It was concluded that the vase life of earlier harvested flowers was longer than of late harvested.
Highlights
Dahlias are perennial plants with tuberous roots, though they are grown as annuals in some regions with cold winters
Total vase solution uptake (g/stem), daily vase solution uptake (g/day FW), proportional FW (%), and vase life (50% of flower petals begin to wilt) parameters were examined with two days intervals
It was determined that the treatment of gibberellic acid had the highest (8.22 days) vase life, and the treatments of carvacrol, thymol and sodium hypochlorite had the lowest (6.89 days) on the vase life (Table 3)
Summary
Dahlias are perennial plants with tuberous roots, though they are grown as annuals in some regions with cold winters. Apart from the shades of blue, offers a full range of colors, including all of the warm colors. In addition to this variation of color and shape, the fact that it is earlier in temperate climatic regions, but generally blooms from July to the first colds of autumn. Photoperiod and average temperature have a crucial role in Dahlia cultivation. Because photoperiod significantly affects the size and the quality of the flower, and the number of flower buds, in combination with temperature, on tuber development, shoot development, and flower formation (Romer, 2008).
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